diff options
Diffstat (limited to 'drivers/scsi/qedf/qedf_attr.c')
| -rw-r--r-- | drivers/scsi/qedf/qedf_attr.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/drivers/scsi/qedf/qedf_attr.c b/drivers/scsi/qedf/qedf_attr.c new file mode 100644 index 000000000000..47720611ad2c --- /dev/null +++ b/drivers/scsi/qedf/qedf_attr.c @@ -0,0 +1,165 @@ +/* + * QLogic FCoE Offload Driver + * Copyright (c) 2016 Cavium Inc. + * + * This software is available under the terms of the GNU General Public License + * (GPL) Version 2, available from the file COPYING in the main directory of + * this source tree. + */ +#include "qedf.h" + +static ssize_t +qedf_fcoe_mac_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fc_lport *lport = shost_priv(class_to_shost(dev)); + u32 port_id; + u8 lport_src_id[3]; + u8 fcoe_mac[6]; + + port_id = fc_host_port_id(lport->host); + lport_src_id[2] = (port_id & 0x000000FF); + lport_src_id[1] = (port_id & 0x0000FF00) >> 8; + lport_src_id[0] = (port_id & 0x00FF0000) >> 16; + fc_fcoe_set_mac(fcoe_mac, lport_src_id); + + return scnprintf(buf, PAGE_SIZE, "%pM\n", fcoe_mac); +} + +static DEVICE_ATTR(fcoe_mac, S_IRUGO, qedf_fcoe_mac_show, NULL); + +struct device_attribute *qedf_host_attrs[] = { + &dev_attr_fcoe_mac, + NULL, +}; + +extern const struct qed_fcoe_ops *qed_ops; + +inline bool qedf_is_vport(struct qedf_ctx *qedf) +{ + return (!(qedf->lport->vport == NULL)); +} + +/* Get base qedf for physical port from vport */ +static struct qedf_ctx *qedf_get_base_qedf(struct qedf_ctx *qedf) +{ + struct fc_lport *lport; + struct fc_lport *base_lport; + + if (!(qedf_is_vport(qedf))) + return NULL; + + lport = qedf->lport; + base_lport = shost_priv(vport_to_shost(lport->vport)); + return (struct qedf_ctx *)(lport_priv(base_lport)); +} + +void qedf_capture_grc_dump(struct qedf_ctx *qedf) +{ + struct qedf_ctx *base_qedf; + + /* Make sure we use the base qedf to take the GRC dump */ + if (qedf_is_vport(qedf)) + base_qedf = qedf_get_base_qedf(qedf); + else + base_qedf = qedf; + + if (test_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags)) { + QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_INFO, + "GRC Dump already captured.\n"); + return; + } + + + qedf_get_grc_dump(base_qedf->cdev, qed_ops->common, + &base_qedf->grcdump, &base_qedf->grcdump_size); + QEDF_ERR(&(base_qedf->dbg_ctx), "GRC Dump captured.\n"); + set_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags); + qedf_uevent_emit(base_qedf->lport->host, QEDF_UEVENT_CODE_GRCDUMP, + NULL); +} + +static ssize_t +qedf_sysfs_read_grcdump(struct file *filep, struct kobject *kobj, + struct bin_attribute *ba, char *buf, loff_t off, + size_t count) +{ + ssize_t ret = 0; + struct fc_lport *lport = shost_priv(dev_to_shost(container_of(kobj, + struct device, kobj))); + struct qedf_ctx *qedf = lport_priv(lport); + + if (test_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags)) { + ret = memory_read_from_buffer(buf, count, &off, + qedf->grcdump, qedf->grcdump_size); + } else { + QEDF_ERR(&(qedf->dbg_ctx), "GRC Dump not captured!\n"); + } + + return ret; +} + +static ssize_t +qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj, + struct bin_attribute *ba, char *buf, loff_t off, + size_t count) +{ + struct fc_lport *lport = NULL; + struct qedf_ctx *qedf = NULL; + long reading; + int ret = 0; + char msg[40]; + + if (off != 0) + return ret; + + + lport = shost_priv(dev_to_shost(container_of(kobj, + struct device, kobj))); + qedf = lport_priv(lport); + + buf[1] = 0; + ret = kstrtol(buf, 10, &reading); + if (ret) { + QEDF_ERR(&(qedf->dbg_ctx), "Invalid input, err(%d)\n", ret); + return ret; + } + + memset(msg, 0, sizeof(msg)); + switch (reading) { + case 0: + memset(qedf->grcdump, 0, qedf->grcdump_size); + clear_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags); + break; + case 1: + qedf_capture_grc_dump(qedf); + break; + } + + return count; +} + +static struct bin_attribute sysfs_grcdump_attr = { + .attr = { + .name = "grcdump", + .mode = S_IRUSR | S_IWUSR, + }, + .size = 0, + .read = qedf_sysfs_read_grcdump, + .write = qedf_sysfs_write_grcdump, +}; + +static struct sysfs_bin_attrs bin_file_entries[] = { + {"grcdump", &sysfs_grcdump_attr}, + {NULL}, +}; + +void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf) +{ + qedf_create_sysfs_attr(qedf->lport->host, bin_file_entries); +} + +void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf) +{ + qedf_remove_sysfs_attr(qedf->lport->host, bin_file_entries); +} |